and to that police shooting of an unarmed teenager, a protest planned this evening. Tensions running so high, police in riot gear, a man with his hands up. Even the president tonight urging calm. Now the police chief and his decision. Will he reveal the name. Officer? ABC's Steve osunsami is there. When I close my eyes, I think about him, and I smile. I wake up, and I'm sad. Reporter: We sat down with the grieving parents who now find now themselves at the center of this storm. They're asking authorities to tell them the name of the officer who killed Michael brown, their 18-year-old son. Just because he sees four black walking down the street that don't mean he fit the profile. Have the police been working with you at all? No, no. This person got to pay for this. This person got to pay. Reporter: These are exclusive new pictures taken just moments after brown was shot to death by a still unidentified Ferguson city police officer. You shoot out the window at a child? Reporter: There's the officer's police SUV, with his lights still flashing. The teenager was unarmed. He and a friend were walking home to his grandmother's house when the friend says the officer drove up, telling them to get off the street. Police say there was a fight with the officer. Witnesses say that's not true. He stood over him and pow, pow. Reporter: The president saying weighing in, calling the death heartbreaking. Police are telling us they're not identifying the police officer because they fear for his safety. We think the value, if any, that might have been gained by releasing the name is far outweighed by the risk of danger. Reporter: Last night young people on the streets clashed with police who used tear gas and rubber bullets. Civil rights groups plan peace rallies tonight. Michael brown was supposed to start school last night. Instead there's a roadside memorial where he died. His father told me he knew his son would light up the world but not this way.

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